Support stand for flat-panel monitor and elevating support for support stand

ABSTRACT

A support stand comprises an elevating support, a monitor bracket, and a support member; the elevating support comprising a first and a second chasses, a pluralities of supporting blocks, an elastic member, a first and a second pivot subassemblies, a shaft sleeve; a guiding shaft; the first chassis comprises a resisting wall on the first end opposite to the second pivot subassembly; the first pivot subassembly is fixed to the plurality of supporting blocks connected to first ends of the chasses, the second pivot subassembly is fixed to the plurality of supporting blocks connected to second ends of the chasses; the shaft sleeve is sleeved on the second pivot subassembly, two ends of the guiding shaft are fixed to the shaft sleeve and the resisting wall; the elastic member is sleeved on the guiding shaft, two ends of the elastic member resist against the resisting wall and the shaft sleeve.

CROSS-REFERENCE TO RELATED APPLICATION

The present application is a divisional application of U.S. patentapplication Ser. No. 12/195,438, filed on Aug. 21, 2008, which claimsall benefits accruing under 35 U.S.C. §119 from CN 200710203495.8, filedon Dec. 27, 2007, the contents of which are hereby incorporated byreference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present disclosure relates generally to support stands and,particularly, to a support stand for a flat-panel display body.

2. Discussion of the Related Art

Flat-panel display bodies, such as liquid crystal display (LCD)monitors, offer advantages, over cathode ray tubes (CRTs) such as agreatly reduced size, and better image quality. Furthermore, because ofthe light weight of the flat-panel display body, the viewing angle andthe height of the flat-panel display body can be adjusted without movinga base of a support stand of the flat-panel display body.

A typical support stand generally includes a monitor bracket forattaching to the flat-panel display body, a rotatable bracket for fixingthe monitor bracket, an elevating support, a support member, and a basemember for mounting the support member. The rotatable bracket isrotatably hinged to an end of the elevating support by a first hingeassembly. The support member is hinged to another end of the elevatingsupport by a second hinge assembly.

A viewing angle of the flat-panel display body mounted on the typicalelevating support can be adjusted by rotating the rotatable bracketrelative to the elevating support. A height of the flat-panel displaybody can be adjusted by rotating the elevating support relative to thesupport member. A frictional force between components of the elevatingsupport balances a gravitational force of the flat-panel display body,thus the flat-panel display body may be retained at a desired position.However, the components of the elevating support may become loose whenthe elevating support is used for a long period of time. As a result,the flat-panel display body may not remain stable at the height selectedby a user. Therefore, the typical elevating support may have arelatively short usage life.

Therefore, an improved support stand for a flat-panel display body isdesired to overcome the above-described shortcomings.

SUMMARY

In one aspect, a support stand for a flat-panel display body includes anelevating support, a monitor bracket, and a support member. Theelevating support includes a first chassis, a second chassis, aplurality of supporting blocks for connecting end portions of the firstchassis and the second chassis, an elastic member, a first pivotsubassembly, and a second pivot subassembly. The monitor bracket isrotatably connected to the first pivot subassembly. The support memberis rotatably connected to the second pivot subassembly. The elasticmember is capable of exerting a rebound force on two of the firstchassis, the second chassis, and the supporting blocks. The first andsecond pivot subassembly are fixed to the supporting blocks. The monitorbracket and the support member are rotatably connected to the first andsecond pivot subassembly correspondingly.

In another aspect, an elevating support, used for a support stand of aflat-panel display body, includes a first chassis including endportions, a second chassis including end portions, a plurality ofsupporting blocks, an elastic member, a first pivot subassembly, asecond pivot subassembly, two rotatable brackets, and a connecting base.The supporting blocks are configured for connecting end portions of theend portions of the first chassis and the second chassis. The elasticmember is capable of exerting a rebound force on two of the firstchassis, the second chassis, and the supporting blocks to make the firstchassis and the second chassis tend to elevate. The first pivotsubassembly is fixed to the supporting blocks connected to a first endportion of the first chassis and the second chassis. The second pivotsubassembly is fixed to the supporting blocks connected to a second endportion of the first chassis and the second chassis opposite to thefirst end portions. The rotatable brackets are rotatably connected tothe first pivot subassembly. The connecting base is rotatably connectedto the second pivot subassembly.

Other advantages and novel features will become more apparent from thefollowing detailed description when taken in conjunction with theaccompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The components in the drawings are not necessarily drawn to scale, theemphasis instead being placed upon clearly illustrating the principlesof the present support stand for a flat-panel display body. Moreover, inthe drawings, like reference numerals designate corresponding partsthroughout the several views.

FIG. 1 is an isometric view of a flat-panel display body having asupport stand in accordance with an exemplary embodiment of the presentapplication.

FIG. 2 is a partially disassembled, isometric view of an elevatingsupport of the support stand in FIG. 1.

FIG. 3 is an exploded, isometric view of a pair of rotatable bracketsand a first pivot subassembly in FIG. 2.

FIG. 4 is an exploded, isometric view of an elastic subassembly, aroller, a shaft, a resisting portion of FIG. 2.

FIG. 5 is an assembled, isometric view of the elevating support of FIG.2.

FIG. 6 is an assembled view of the stand support in FIG. 1, and showingthe elevating support of the stand support rotated to a first utmostposition (lowest position).

FIG. 7 is similar to FIG. 6, but showing the elevating support of thestand support rotated to a second utmost position (highest position).

FIG. 8 is a partially assembled, isometric view of an elevating supportin accordance with a second exemplary embodiment of the presentinvention.

FIG. 9 is a partially assembled isometric view of an elevating supportin accordance with a third exemplary embodiment of the presentinvention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Reference will now be made to the drawings to describe the embodimentsof the present support stand and elevating support in detail. Referringto FIG. 1, a flat-panel display body 100 includes a display body 10 anda stand support 102. The stand support 102 includes a support member 20,an elevating support 30, and a monitor bracket 50 for holding theflat-panel display body. An end of the elevating support 30 is connectedto the support member 20 and another end of the elevating support 30opposite to the support member 20 is rotatably attached to the monitorbracket 50.

Referring to FIG. 2, the elevating support 30 includes a pair ofrotatable brackets 301, a bracket subassembly 302, a connecting base303, a first pivot subassembly 305, a second pivot subassembly 306, aroller 307, a resisting member 308, and an elastic subassembly 309. Afirst end of the bracket subassembly 302 is rotatably connected to therotatable brackets 301 via the first pivot subassembly 305. A second endopposite to the first end of the bracket subassembly 302 is rotatablyconnected to the connecting base 303 via the second pivot subassembly306.

Referring also to FIG. 3, each of the pair of rotatable brackets 301forms a restricting block 3012 and a notch 3013. Each of the pair ofrotatable brackets 301 is rotatably connected to the first pivotsubassembly 305. The monitor bracket 50 is fixed to each of the pair orrotatable brackets 301. The rotatable brackets 301 may be integrallyformed. The number of the rotatable brackets 301 may be more than two.

The bracket subassembly 302 includes a first chassis 321, a secondchassis 322, and four supporting assemblies 323 (a first supportingassembly, a second supporting assembly, a third supporting assembly, anda fourth supporting assembly). The first chassis 321 includes a flatbase 3211, two side walls 3212 extending perpendicularly from oppositesides of the flat base 3211, and a resisting wall 3213 defining athrough hole 3214. The resisting wall 3213 extends perpendicularly froma top end of the flat base 3211 and perpendicularly relative to the sidewalls 3212. Each of the side walls 3212 defines a guiding slot 3215.

The second chassis 322 is similar to the first chassis 321 except thatthe second chassis 322 does not include a resisting wall, and side walls3222 of the second chassis 322 does not define guiding slots.

Each of the supporting subassemblies 323 includes a pair of supportingblocks 3231, a pair of pivot shafts 3232, four tab washers 3233, a pairof resilient rings 3235.

Each of the supporting blocks 3231 defines two pivot holes (not labeled)adjacent to two end portions and a fixing hole (not labeled) in a middleportion. Each of the supporting subassemblies 323 is rotatably attachedto ends of the first chassis 321 and the second chassis 322 via the twopivot holes of the supporting blocks 323 and the pair of pivot shafts3232. Two supporting subassemblies 323 are fixed to the first pivotsubassembly 305 via each of the fixing hole of the two supporting blocks3231. Remaining two supporting subassemblies 323 are fixed to the secondpivot subassembly 306 via each of the fixing hole of the remaining twosupporting blocks 3231.

The connecting base 303 is substantially U-shaped. The connecting base303 includes two parallel side walls (not labeled). Each side wall ofthe connecting base 303 defines a through hole (not shown).

The first pivot subassembly 305 includes a first pivot shaft 351, asleeve 352 sleeved on the first pivot shaft 351, a torsion spring 353sleeved on the sleeve 352, and two first hinge subassemblies (notlabeled). The sleeve 352 is sleeved on a middle portion of the firstpivot shaft 351. The torsion spring 353 is sleeved on the sleeve 352.The first hinge subassemblies are attached to opposite shaft portions ofthe first pivot shaft 351 correspondingly. Each of the first hingesubassemblies includes a limiting washer 354, a first pressing washer355, a first protecting washer 356, a second protecting washer 357, twofirst resilient rings 358, a first washer 359, a adjustable nut 3050, asecond resilient ring 3051, a second pressing washer 3052, a secondwasher 3053, and a nut 3055.

The first pivot shaft 351 is substantially cylindrical, and includes twoshaft portions 3511 at opposite ends. Each of the two shaft portions3511 defines a thread (not labeled) on a distal end portion. Each of thetwo shaft portions 3511 is non-circular. In this embodiment, across-section taken perpendicular to a central axis of each of the twoshaft portions 3511 is double D-shaped, thereby forming two flatsurfaces. Thus, the thread is discontinuous.

The torsion spring 353 includes two torsion portions (not labeled), ann-shaped connecting portion 3532 for connecting each of the two torsionportions. Each of the two torsion portions of the torsion spring 353includes a latching end 3533.

The limiting washer 354 defines a deformed hole (not labeled) in amiddle portion of the limiting washer 354. A shape and a size of thedeformed hole correspond to a cross-section of each of the two shaftportions 3511. The limiting washer 354 defines a restricting groove 3541and a latching groove 3542 on a periphery.

The second pivot subassembly 306 includes a second pivot shaft 361 andtwo second hinge subassemblies (not labeled). The resisting member 308is sleeved on a middle portion of the second pivot shaft 361. The secondhinge subassemblies are attached to opposite shaft portions of thesecond pivot shaft 361. Each of the second hinge subassembly includes ablock 362, two resilient rings 363, 364, a resilient washer 365, awasher 366, and a nut 367.

Referring to FIG. 2 and FIG. 4, the roller 307 is substantially a hollowcylinder. The roller 307 is rotatably disposed between the two guidingslots 3215 of the first chassis 321 via a shaft 370. The shaft 370 issubstantially cylindrical, and includes two latching ends 3701 atopposite ends. The latching end 3701 forms a restricting pole 3702 on adistal end portion. The latching end 3701 is non-circular, and in apreferred embodiment has a double D shape. The roller 307 is sleeved ona middle portion of the shaft 370. Each end of the shaft 370 isconfigured to extend through a bearing 371, a first washer 372, aholding groove 3931 of a pressing block 393, a second washer 373, andthe guiding slot 3215 of the first chassis 321 in that order. A clipring 374 is configured to engage in a latching groove of the restrictingpole 3702 so as to prevent the shaft 370 from being detached from thefirst chassis 321.

The resisting member 308 includes a cylindrical portion 3081 and afixing portion (not labeled) extending from the cylindrical portion3081. The resisting member 308 is fixed to a surface of the connectingbase 303. The resisting member 308 is configured to resist the roller307.

The elastic subassembly 309 includes a spring 391, a guiding shaft 392,and the pressing block 393. The spring 391 is sleeved on the guidingshaft 392. Two ends of the guiding shaft 392 are connected to thepressing block 393 and the resisting wall 3213 of the first chassis 321correspondingly. The pressing block 393 is substantially U-shaped. Eachend of the pressing block 393 defines the holding groove 3931. Theholding grooves 3931 are configured to non-rotatably latch on to each ofthe two latching ends 3701 of the shaft 370.

Alternatively, the guiding slots 3215 of the first chassis 321 may bereplaced by a pair of guiding rails. In such cases, the restricting pole3702 of the shaft 370 is slidably connected to the guiding rails. Thepressing block 393 may be other shapes, such as a cuboid defining aholding groove.

Referring to FIGS. 2 through 5, in assembly of the elevating support 30,the roller 307 and the elastic subassembly 309 are attached to the firstchassis 321 via the shaft 370 and the guiding shaft 392 of the elasticsubassembly 309. The restricting pole 3702 of the shaft 370 is slidablyreceived in each of the guiding slot 3215 of the first chassis 321.Then, ends of each side wall 3212 of the first chassis 321 and ends ofeach side wall 3222 of the second chassis 322 are rotatably connected tothe supporting subassemblies 323.

The sleeve 352 is sleeved on the middle portion of the first pivot shaft351. The torsion spring 353 is sleeved on the sleeve 352. Then, eachopposite shaft portions of the first pivot shaft 351 is passed throughthe components of each first hinge subassembly such as the limitingwasher 354, the first pressing washer 355, the first protecting washer356, each of the pair of rotatable brackets 301, the second protectingwasher 357, two first resilient rings 358, the first washer 359, theadjustable nut 3050, and each of the two supporting assemblies 323, inthat order. The n-shaped connecting portion 3532 of the torsion spring353 engages in the notch 3013 of each of the pair of rotatable brackets301. The latching end 3533 of the torsion spring 353 is inserted intothe latching groove 3542 of the limiting washer 354. Thus, the firstpivot subassembly 305 is connected to the supporting subassemblies 323.After that, each opposite shaft portions of the first pivot shaft 351 ispassed through the components of each first hinge subassembly such asthe second resilient ring 3051, the second pressing washer 3052, and thesecond washer 3053, in that order. The nut 3055 then engages with eachend of the first pivot shaft 351 correspondingly.

The resisting member 308 is sleeved on the middle portion of the secondpivot shaft 361 of the second pivot subassembly 306. Then, each oppositeportions of the second pivot shaft 361 is passed through the componentsof each second hinge subassembly such as the block 362, the side wall ofthe connecting base 303, a resilient ring 363, each of the two remainingsupporting subassemblies 323, the resilient ring 364, the resilientwasher 365, and the washer 366, in that order. The nut 367 engages witheach of the distal ends of the second pivot shaft 361. As such, theother end of the bracket subassembly 302 is rotatably connected to theconnecting base 303 via the second pivot subassembly 306. The resistingmember 308 is fixed to the connecting base 303. The cylindrical portion3081 of the resisting member 308 resists the roller 307.

When the stand support 102 is used for supporting a flat-panel displaybody, an end of the monitor bracket 50 of the stand support 102 is fixedto a display body 10 of the flat-panel display body 100, and an oppositeend is fixed to the pair of rotatable brackets 301 of the elevatingsupport 30. The connecting base 303 is fixed to the support member 20.In use, a force is applied on the display body 10 for rotating thedisplay body 10 with the pair of rotatable brackets 301 relative to thebracket subassembly 302 along an axis of the first pivot shaft 351 ofthe first pivot subassembly 305, thereby adjusting the viewing angle ofthe flat-panel display body 100. A frictional force between the pair ofrotatable brackets 301 and other components of the first pivotsubassembly 305 enables the display body 10 to maintain at a desiredposition. An external force for rotating the pair of rotatable brackets301 may be changed by adjusting the adjustable nuts 3050 of the firstpivot subassembly 305. The restricting block 3012 of each of therotatable brackets 301 and the restricting groove 3542 of the limitingwashers 354 cooperatively restrict each of the rotatable brackets 301 inlimited adjusting range. A torsion force of the torsion spring 353either increases or decreases according to the rotation of each of therotatable brackets 301, thereby preventing an excessive force fromdamaging the first pivot subassembly 305.

Referring to FIGS. 3 and 6, the elevating support 30 is in a firstutmost position (lowest position), the restricting poles 3702 of theshaft 370 abut against the restricting holes 3215 and the restrictingblocks 3012 of the rotatable bracket 301 abut against the restrictinggroove 3541 of the limiting washers 354, thereby restricting therotatable bracket 301 together with the monitor bracket 50 in a minimumheight. The monitor bracket 50, the elevating support 30, and thesupport member 20 are substantially parallel to each other, so that thepackage volume of the stand support 102 is decreased.

Referring also to FIGS. 1 and 2, when the height of the rotatablebracket 301 together with the display body 10 needs to increase, thedisplay body 10 is pushed upwards so that the elevating support 30 ismoved up to increase the height of the display body. During the movingof the bracket subassembly 302 of the elevating support 30, the spring391 of the elastic subassembly 309 resists the resisting wall 3213 andthe pressing block 393. A resisting force applied on the pressing block393 indirectly acts on the connecting base 303 via the shaft 370, theroller 307, and the resisting member 308. A rebound force of the spring391 indirectly applies on the bracket subassembly 302, so that an anglebetween the side walls 3212 of the first chassis 321 and the supportingsubassemblies 323 connected to the connecting base 303 has a tendency ofbecoming larger. In other words, a distance between the first chassis321 and the second chassis 322 has a tendency of becoming smaller. Thebracket subassembly 302 always has a tendency of elevating. In addition,the rebound force of the spring 391 indirectly acted on the bracketsubassembly 302 partially balances a gravitational force acting on thedisplay body 10. When the display body 10 is lifted to a predeterminedheight, the display body 10 can be stably maintained at thepredetermined height by frictional forces created by the first chassis321, the second chassis 322, the supporting assemblies 323, and thesecond pivot subassembly 306.

When an external force is applied on the display 10 to make therotatable brackets 301 rotate relative to the first pivot shaft 351 ofthe first pivot subassembly 305, the viewing angle of the display body10 is adjusted. When the external force is released, frictional forcesbetween the rotatable bracket 301 and components of the first pivotsubassembly 305 enable the display body 10 to retain in a desiredposition.

In alternative embodiments, the elastic subassembly 309 may be omitted.In such cases, a torsion spring is disposed between the side wall 3212of the first chassis 321 and the supporting subassembly 323. The torsionspring is sleeved on the second pivot shaft 361. Two ends of the torsionspring are fixed to the side wall 3212 of the first chassis 321 and thesupporting subassembly 323 correspondingly, and the torsion spring iscompressed between the first chassis 321 and the supporting subassembly323 connected to the connecting base 303. The torsion spring is capableof exerting a rebound force on the side wall 3212 of the first chassis321 and the supporting subassembly 323. The angle between the side walls3212 of the first chassis 321 and the supporting subassemblies 323 has atendency of becoming larger. Therefore, the distance between the firstchassis 321 and the second chassis 322 has a tendency of becomingsmaller. The rebound force of the torsion spring partially balances thegravitational force acting on the display body 10. Alternatively, thetorsion spring may be replaced by a compression spring with two ringsformed at distal ends. The two rings of the compression spring are fixedto the side wall 3222 of the second chassis 322 and the supportingsubassembly 323 correspondingly.

Referring to FIGS. 3 and 7, the elevating support 30 is in a secondutmost position (highest position), the restricting poles 3702 of theshaft 370 abut against the restricting holes 3215 and the restrictingblocks 3012 of the rotatable bracket 301 abut against the restrictinggroove 3541 of the limiting washers 354, thereby restricting therotatable bracket 301 together with the monitor bracket 50 in a maximumheight.

A torsion force of the tension spring 353 either increases or decreasesaccording to the motion of the elevating support 30, thereby furtherpreventing an excessive force from damaging the elevating support 30.Therefore, the usage life of the elevating support 30 is prolonged.Further, the first and second utmost positions are restricted by therestricting poles 3702 abutting against the restricting grooves 3215 andthe restricting blocks 3012 abutting against the restricting groove3541, thus the elevating support 30 is effectively restricting betweenthe first utmost position to the second utmost position. In other words,the display body can be adjusted between the minimum height and themaximum height.

Referring to FIG. 8, in a second exemplary embodiment, an elevatingsupport 60 is similar in principle to the elevating support 30 exceptthe following differences. Firstly, a resisting wall 6213 of a firstchassis 621 is a cuboid block. Secondly, an elastic subassembly 609includes a spring 691, a guiding shaft 692, and a pressing block 693.Each end of the pressing block 693 defines a shaft hole (not labeled)for inserting a shaft 670. A roller 607 is rotatably disposed betweentwo ends of the pressing block 693 via the shaft 670. In suchconditions, two side walls of the first chassis 621 do not defineguiding slots.

Referring to FIG. 9, an elevating support 90 in accordance with a thirdexemplary embodiment is shown. The elevating support 90 is similar inprinciple to the elevating support 30 except the following differences.Firstly, an elastic subassembly 909 of the elevating support 90 includesa spring 991, a guiding shaft 992, and a shaft sleeve 993. The spring991 is sleeved on the guiding shaft 992. Two ends of the spring 991resist a resisting wall 9213 of a first chassis 921 and the shaft sleeve993 respectively. Two ends of the guiding shaft 992 are connected to theshaft sleeve 993 and the resisting wall 9213 of the first chassis 921.Secondly, the shaft sleeve 993 is sleeved on a second pivot shaft 961 ofa second pivot subassembly. The elevating support 90 does not include aroller, a shaft extending through the roller, a resisting member, andtwo guiding slots defined in the first chassis 921.

It is believed that the present embodiments and their advantages will beunderstood from the foregoing description, and it will be apparent thatvarious changes may be made thereto without departing from the spiritand scope of the invention or sacrificing all of its materialadvantages, the examples hereinbefore described merely being preferredor exemplary embodiments of the invention.

What is claimed is:
 1. A support stand for a flat-panel display body,comprising: an elevating support, comprising a first chassis, a secondchassis, a first plurality of supporting blocks and a second pluralityof supporting blocks, an elastic member, a first pivot subassembly, anda second pivot subassembly; wherein the elastic member is capable ofexerting a rebound force on at least two of the first chassis, thesecond chassis, the first and the second pluralities of supportingblocks to make the first chassis and the second chassis tend to elevate,the first pivot subassembly is fixed to the first plurality ofsupporting blocks which are connected to a first end portion of thefirst chassis and a first end portion of the second chassis, and thesecond pivot subassembly is fixed to the second plurality of supportingblocks which are connected to a second end portion of the first chassisand a second end portion of the second chassis; a monitor bracketrotatably connected to the first pivot subassembly; and a support memberrotatably connected to the second pivot subassembly, wherein the firstchassis comprises a resisting wall formed on the first end portionthereof opposite to the second pivot subassembly, and wherein theelevating support further comprises a shaft sleeve; and a guiding shaft;the shaft sleeve is sleeved on the second pivot subassembly, two ends ofthe guiding shaft are respectively fixed to the shaft sleeve and theresisting wall, the elastic member is sleeved on the guiding shaft, twoends of the elastic member resist against the resisting wall and theshaft sleeve respectively.
 2. The support stand as claimed in claim 1,the elevating support further comprises a connecting base, theconnecting base is rotatably connected to the second plurality ofsupporting blocks; the shaft sleeve is received within the connectingbase.
 3. The support stand as claimed in claim 2, the resisting wall ofthe first chassis defines a through hole, the top end of the guidingshaft is inserted into the through hole, and the bottom end of theguiding shaft is fixed to the shaft sleeve.
 4. The support stand asclaimed in claim 3, the first chassis further comprises a flat base, andtwo side walls extending from opposite sides of the flat base; whereinthe resisting wall extends from a top end of the flat base away from theconnecting base, and perpendicularly relative to the side walls.
 5. Thesupport stand as claimed in claim 1, the support stand further comprisesa pair of rotatable brackets; each of the pair of rotatable brackets isrotatably connected to the first end portion first chassis via the firstpivot subassembly.
 6. The support stand as claimed in claim 4, the firstpivot subassembly comprises a first pivot shaft, a sleeve sleeved on thefirst pivot shaft, a torsion spring sleeved on the sleeve, and two firsthinge subassemblies attached to opposite shaft portions of the firstpivot shaft; a plurality of rotatable brackets are rotatably mounted tothe first pivot shaft and engage with torsion spring.
 7. The supportstand as claimed in claim 6, wherein the shaft portion is non-circular,a cross-section taken perpendicular to a central axis of the shaftportion is double D-shaped, thereby forming two flat surfaces.
 8. Thesupport stand as claimed in claim 6, the first pivot subassembly furthercomprises two limiting washers sleeved on opposite ends of the shaftportions of the first pivot shaft and positioned adjacent to two ends ofthe torsion spring; each of the two limiting washer defines arestricting groove and a latching groove on a periphery; each of theplurality of rotatable brackets forms a restricting block and a notch,the torsion spring comprises two torsion portions, an n-shapedconnecting portion connected to the torsion portions, each of the twotorsion portions comprises a latching end; the n-shaped connectingportion is engaged in the notch of each of the plurality of rotatablebrackets, each latching end of the torsion spring is inserted into thelatching groove of each of the two limiting washers.
 9. The supportstand as claimed in claim 8, the second pivot subassembly comprises asecond pivot shaft, and two second hinge subassemblies; a shaft sleeveis sleeved on a middle portion of the second pivot shaft; each of thesecond hinge subassemblies is attached to each shaft portion of thesecond pivot shaft.
 10. An elevating support for a support stand of aflat-panel display body, the elevating support comprising: a firstchassis including end portions; a second chassis including end portions;a plurality of supporting blocks for connecting the end portions of thefirst chassis and the second chassis; an elastic member, the elasticmember being capable of exerting a rebound force on at least two of thefirst chassis, the second chassis, and the supporting blocks to make thefirst chassis and the second chassis tend to elevate; a first pivotsubassembly fixed to the plurality of supporting blocks which areconnected to a first end portion of the first chassis and a first endportion of the second chassis; a second pivot subassembly fixed to theplurality of supporting blocks which are connected to a second endportion of the first chassis and second end portion of the secondchassis; at least one rotatable bracket rotatably connected to the firstpivot subassembly; and a connecting base rotatably connected to thesecond pivot subassembly, wherein the first chassis comprises aresisting wall formed on the first end portion thereof opposite to thesecond pivot subassembly, and wherein the elevating support furthercomprises a shaft sleeve; and a guiding shaft, the shaft sleeve issleeved on the second pivot subassembly, two ends of the guiding shaftare respectively fixed to the shaft sleeve and the resisting wall of thefirst chassis, the elastic member is sleeved on the guiding shaft, twoends of the elastic member resist against the resisting wall of thefirst chassis and the shaft sleeve respectively.
 11. The elevatingsupport as claimed in claim 10, wherein the resisting wall of the firstchassis defines a through hole, the top end of the guiding shaft isinserted into the through hole, the bottom end of the guiding shaft isfixed to the shaft sleeve; the shaft sleeve is received within theconnecting base, the elastic member is disposed between the resistingwall of the first chassis and the shaft sleeve.
 12. The elevatingsupport as claimed in claim 11, the first chassis further comprises aflat base; and two side walls extending from opposite sides of the flatbase, the resisting wall extends from a top end of the flat base awayfrom the connecting base, and perpendicularly to each of the two sidewalls.
 13. The elevating support as claimed in claim 12, the firstchassis comprise a flat base; and two side walls perpendicularlyextending from opposite sides of the flat base, each of the two sidewalls defines a guiding slot, and two ends of a shaft are slidablyreceived in the guiding slot correspondingly.
 14. The elevating supportas claimed in claim 13, the first pivot subassembly comprises a firstpivot shaft, a sleeve sleeved on the first pivot shaft, a torsion springsleeved on the sleeve, and two first hinge subassemblies attached toopposite shaft portions of the first pivot shaft; the at least onerotatable bracket is rotatably mounted to the first pivot shaft andengaged with torsion spring.
 15. The elevating support as claimed inclaim 13, the first pivot subassembly further comprises two limitingwashers, each of the two limiting washers defines a restricting groove,the at least one rotatable bracket comprises two rotatable brackets,each of the two rotatable bracket is sleeved on the pivot shaft, each ofthe two rotatable brackets forms a restricting block, and therestricting block and the restricting groove cooperatively restrict eachof the two rotatable brackets in limited adjusting range.
 16. Theelevating support as claimed in claim 15, the torsion spring comprisestwo torsion portions and an n-shaped connecting portion connected toeach of the two torsion portions, each of the two torsion portionscomprises a latching end for abutting against each of the two limitingwashers, and the n-shaped connecting portion is fixed to each of the tworotatable brackets.
 17. The elevating support as claimed in claim 13,the first pivot subassembly comprise a first pivot shaft, a sleevesleeved on the first pivot shaft, a torsion spring sleeved on thesleeve, two first hinge subassemblies attached to opposite shaftportions of the first pivot shaft, and the torsion spring is configuredto change length in response to a rotation of the at least one rotatablebracket, thereby preventing an excessive force from damaging the firstpivot subassembly.